Errors:
Almost standards mode doctype. Expected “<!DOCTYPE html>”.
A document must not include more than one “meta” element with a “http-equiv” attribute whose value is “content-type”.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Self-closing syntax (“/>”) used on a non-void HTML element. Ignoring the slash and treating as a start tag.
The “cellspacing” attribute on the “table” element is obsolete. Use CSS instead.
The “cellpadding” attribute on the “table” element is obsolete. Use CSS instead.
The “width” attribute on the “table” element is obsolete. Use CSS instead.
The “border” attribute on the “table” element is obsolete. Use CSS instead.
The “width” attribute on the “td” element is obsolete. Use CSS instead.
The “valign” attribute on the “td” element is obsolete. Use CSS instead.
The “align” attribute on the “p” element is obsolete. Use CSS instead.
Bad value “” for attribute “action” on element “form”: Must be non-empty.
The “align” attribute on the “div” element is obsolete. Use CSS instead.
The “align” attribute on the “table” element is obsolete. Use CSS instead.
The “summary” attribute on the “table” element is obsolete. Consider describing the structure of the “table” in a “caption” element or in a “figure” element containing the “table”; or, simplify the structure of the “table” so that no description is needed.
End tag “strong” violates nesting rules.
No “a” element in scope but a “a” end tag seen.
Stray end tag “a”.
Stray end tag “div”.
Warnings:
The “language” attribute on the “script” element is obsolete. You can safely omit it.
The “border” attribute is obsolete. Consider specifying “img { border: 0; }” in CSS instead.
Empty heading.
This document appears to be written in Indonesian but the “html” start tag has “lang="en-US"”. Consider using “lang="id"” (or variant) instead.
Indonesia ID